PDB Statistics: PDB Data Distribution by Molecular Weight (Structure)

All macromolecules, small molecules, and ions are included, except for water molecules. Molecular weight is calculated for all atoms, including those not observed in the experiment. Molecular weight of all non-water atoms in the asymmetric unit.

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Molecular Weight (Daltons)Number of Entries
< 20K33,919
20K - 40K49,587
40K - 60K36,394
60K - 80K23,166
80K - 100K15,842
100K - 120K11,467
120K - 140K7,870
140K - 160K6,557
160K - 180K5,275
180K - 200K3,820
200K - 220K3,237
220K - 240K2,566
240K - 260K2,026
260K - 280K1,744
280K - 300K1,406
300K - 320K1,138
320K - 340K1,053
340K - 360K1,061
360K - 380K871
>= 380K13,416